YD25DDTi - Cat removal

The Gas and Diesel Engines - VQ40De, VK56DE, YD25DDTi, V9X, Transmission, Transfer Case, Oil, Differentials, Axles, Exhaust...

Moderator: volvite

Posts: 5
Joined: Thu Sep 06, 2018 11:45 pm

YD25DDTi - Cat removal

Postby nzmikec » Mon Sep 06, 2021 11:48 am

Anyone have any experience with removing the catalytic core from a YD25DDTi Euro 3?
There appears to be no monitoring after the catalytic converter so shouldn't fault any engine codes? Mine is partially foweled so hoping for some fuel efficiency / power gains.

Posts: 81
Joined: Tue Apr 28, 2020 4:41 pm
Location: Torontah

Re: YD25DDTi - Cat removal

Postby TooMuchControl » Mon Sep 06, 2021 1:43 pm

I've no experience with these engines, but I'm certain that there is monitoring after a catalytic.
The upstream is usually an air ratio, and the downstream is efficiency?

I found this discussion thread on cat removals that probably helps you out better.

https://www.nissan-navara.net/threads/c ... post-33390

Return to “R51 Engine, Driveline and Powertrain”